Due to the attack of fumes of sulphur dioxide | vedclass

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(A) Stone leprosy is a phenomenon caused by the reaction of atmospheric pollutants like $SO_{2}$ and $H_{2}SO_{4}$ with calcium carbonate $(CaCO_{3})$

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Stone leprosy

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(A) Stone leprosy is a phenomenon caused by the reaction of atmospheric pollutants like $SO_{2}$ and $H_{2}SO_{4}$ with calcium carbonate $(CaCO_{3})$ present in marble and red sandstone.These pollutants react with the stone to form calcium sulphate $(CaSO_{4})$,which is powdery and leads to the yellowing and flaking of the stone surface,a condition known as stone leprosy.The Taj Mahal is affected by $SO_{2}$ emissions,historically linked to the Mathura refinery,while the Red Fort is affected by $SO_{2}$ from coal burning in nearby railway yards.

Due to the attack of fumes of sulphur dioxide and sulphuric acid,the marble of the Taj Mahal and the red stone of the Red Fort changed into calcium sulphate,which causes:

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